Circulator.



G. J. WATTS.

GIRGULATOR.

APPLICATION FILED DEO.4,1908.

Patented Apr. 6, 1909..

CHARLES JAMES WATTS, OF TROWBRlDGE, ENGLAND.

CIRCULATOR.

Specification of Letters Patent.

Patented April 6, 1909.

Application filed December 4, 1906. Seria1No. 466,020.

To all whom 'it may concern:

Be it known that I, CI'IARLES.JAMES Vv'i'rrs, a citizen of the United Kin dom of Great Britain and Ireland, and resident i within hot water boilers, pipes, radiators and the like. A

It has hitherto been proposed to use propellers consisting of two or more blades on one boss or hub, also to use continuous screw or Archimedean propellers. I The former method has the disadvantage of possessing too little power and the latter arrange 4 nientxforms too circuitous a passage for the watenfand has generally to be usedin connection 'with by-passes.

My invention consists in the combined use of a number of propellers of particular construction and arrangement whereby the disadvantages of both systems are entirely overcome.

According to my invention I arrange a number of propellers on a common shaft the position of the propellers being similar to the direction or path followed by the edge of an Archimedean screw, that is to say, commencing at the end propeller and following the line indicated by the tip of the blades, the tip of the second propeller would be reached and from that a continuationof the same direction would touch the tip of the third propeller and so on to the fourth and the other propellers to that furthermost from the one started with. These propellers are arranged as close to one another as is the blades whenever the propellers are at rest.

In my invention as with other methods already adopted the shaft carrying the propellers is driven by some external meanssuch as the continuation of the shaft through the pipe in which it is arranged and connected directly to a motor shaft-or by mounting a pulley on the end of the propeller shaft-said pulley being driven by a bolt or chain from a motor.

I will now describe my invention with reference, to the accompanying drawings in which-:-

Figure 1. is an end view of a shaft a carrying six two-blade propellers. Fig. 2. is a side view of the propellers shown 1n Fig. 1, and Fig. 3. illustrates a similar set of propellers arranged in a case in the waterway of the heating apparatus.

It will be observed that the propellers are formed of blades I) mounted on bosses c, the construction of the individual propellers being identical but their arrangement on the shaft being in echelon and capable of adj ustment so that a steep or shallow pitch can be obtained. The bosses c are formed with scalloped edges and after Setting one propeller the next can be fitted to it one or more scal-v lops in advance, and by following the same number with the next and following propellers each one in advance of that immediately proceeding it a perfectly formed and equally balanced device is arranged. Any suitable means may be employed for fixing the propellers to the shaft the examples showing sleeve-like ends or collars all having scalloped edges similar to those on the propellers, said collars being keyed or otherwise fixed, the examples shown in Fi 3. illustrating one of the collars secured %y a pin and the other by a nut c-3threaded onto the shaft and secured by a pin. a

Any suitable number of inlets f to the case '9 may be provided and while the case is should be, and any convenient means of fixing same to their shaft may be employed.

What I claim and desire to secure by Letters Patent is 1.- In a circulator, a suitably driven shaft,

sleeves on the shaft having scalloped edges,

the scallops of the'contignous sleeves being sleeve being interlocked with the scallo s of interlocked, and blades radiating from the the contiguous sleeves, blades radiating om said sleeves. v the sleeves and means for holdingthe sleeves 2. In a circulator, a suitably driven shaft, in interlocked engagement. 5 sleeves on the shaft having scalloped edges, In witness whereof I have hereunto set 15 the'scallops of the contiguous sleeves being my hand in resence of two witnesses.

interlocked, and blades radiating from the O ARLES JAMES WATTS. said sleeves and arranged in echelon. Witnesses: l 1

3. 4, In a circulator, a shaft,'sleeves thereon HENRY Faimo'rnnn,

10 having scalloped edges, the scallops of one. JNo. ALDRIDGE- 

